TDA3673T PHILIPS [NXP Semiconductors], TDA3673T Datasheet - Page 6

• Manufacturer Part Number: TDA3673T
• Description: Very low dropout voltage/quiescent current 3.3 V voltage regulator with enable
• Manufacturer: PHILIPS [NXP Semiconductors]

andbook, halfpage
Philips Semiconductors
TEST AND APPLICATION INFORMATION
Noise
The output noise is determined by the value of the output
capacitor. The noise figure is measured at a bandwidth of
10 Hz to 100 kHz (see Table 1).
Table 1 Noise figures
Stability
The regulator is stabilized with an external capacitor
connected to the output. The value of this capacitor can be
selected using the diagrams shown in Figs 4 and 5.
The following four examples show the effects of the
stabilization circuit using different values for the output
capacitor.
2000 Feb 01
CURRENT
I
Very low dropout voltage/quiescent current
3.3 V voltage regulator with enable
OUTPUT
REG
V
(1) C1 is optional (to minimize supply noise only).
I(EN)
0.5
50
(mA)
V I(EN)
= 5 V.
V P
C1
1 F
(1)
C2 = 10 F
550
650
Fig.3 Test circuit.
8
5
TDA3673
2, 3, 6, 7
NOISE FIGURE ( V)
C2 = 47 F
1
MGS595
320
400
C2
10 F
V REG = 3.3 V
C2 = 100 F
300
400
6
handbook, halfpage
handbook, halfpage
(1) Maximum ESR at 200 A
(2) Minimum ESR only when I
Fig.4
Fig.5
ESR
ESR
( )
( )
10
10
10
10
10
10
10
22
10
1
1
2
3
2
1
1
1
1
Graph for selecting the value of the output
capacitor.
ESR as a function of I
value of the output capacitor.
(2)
stable region
10
1
(1)
stable region
REG
I
REG
200 A.
100 mA.
REG
Preliminary specification
10
10
2
for selecting the
I REG (mA)
C2 ( F)
TDA3673
MDA961
MDA962
10
10
2
3